Is this a good idea for a business? Be Honest.?

I am really into making Cards and cakes. My fiance's sister is a trained florist too. I would like to set up a business in my local area in which you can get everything, all your cards, birthday cakes ect, balloons and flowers. Would this be a good idea for a buisness, is it a good idea to turn my hobby into my... show more I am really into making Cards and cakes. My fiance's sister is a trained florist too. I would like to set up a business in my local area in which you can get everything, all your cards, birthday cakes ect, balloons and flowers. Would this be a good idea for a buisness, is it a good idea to turn my hobby into my dream? I would also like to keep my weekend job would that be possible, I just work in a shop.
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